Spectra Power and Bandwidth of Fiber Bragg Grating Under Influence of Gradient Strain

作     者：Qinpeng LIU Xueguang QIAO Zhen'an JIA Haiwei FU 

作者机构：Key Laboratory on Photoelectric Oil-Gas Logging and Detecting (Ministry of Education) Xi'an Shiyou University Xi'an 710065 China 

出 版 物：《Photonic Sensors》 (光子传感器（英文版）)

年 卷 期：2016年第6卷第4期

页      面：333-338页

核心收录：

学科分类：0808[工学-电气工程] 070207[理学-光学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 08[工学] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0813[工学-建筑学] 0702[理学-物理学] 

基　　金：This work was supported in part by the National Natural Science Foundation of China (No. 61077006 60727004  and 61077060)  in part by the Ministry of Education Project of Science and Technology Innovation (No. Z08119)  and in part by the Shannxi Province National Science Foundation under Grant 2016JM6055 

主　　题：Fiber Bragg grating gradient strain reflective spectrum power reflective spectrum bandwidth 

摘      要：The reflective spectrum power and the bandwidth of the fiber Bragg grating （FBG） under gradient strain are researched and experimentally demonstrated. The gradient strain is applied on the FBG, which can induce FBG bandwidth broadening, resulting in the variation of reflective power. Based on the coupled-mode theory and transfer matrix method, the segmental linear relationship between the gradient strain, the reflective power, and the bandwidth is simulated and analyzed, and the influence of the FBG length on the reflective spectrum is analyzed. In the experiment, the strict gradient stain device is designed; the experimental results indicate that the reflective optic power and the bandwidth of the FBG under gradient stain are concerned with the length of the FBG. Experimental results are well consistent with the theoretical analysis, which have important guiding significance in the FBG dynamic sensing.